四、在$□$里填合适的数。
17 ÷ $□$ = 2 ······ 1 31 ÷ $□$ = 4 ······ 3 26 ÷ $□$ = 3 ······ 2
19 ÷ $□$ = 3 ······ 1 25 ÷ $□$ = 6 ······ 1 42 ÷ $□$ = 5 ······ 2
57 ÷ $□$ = 6 ······ 3 37 ÷ $□$ = 5 ······ 2 62 ÷ $□$ = 7 ······ 6
29 ÷ $□$ = 4 ······ 1 66 ÷ $□$ = 7 ······ 3 47 ÷ $□$ = 5 ······ 2
13 ÷ $□$ = 4 ······ 1 38 ÷ $□$ = 6 ······ 2 45 ÷ $□$ = 6 ······ 3
74 ÷ $□$ = 8 ······ 2 50 ÷ $□$ = 7 ······ 1 55 ÷ $□$ = 7 ······ 6
17 ÷ $□$ = 2 ······ 1 31 ÷ $□$ = 4 ······ 3 26 ÷ $□$ = 3 ······ 2
19 ÷ $□$ = 3 ······ 1 25 ÷ $□$ = 6 ······ 1 42 ÷ $□$ = 5 ······ 2
57 ÷ $□$ = 6 ······ 3 37 ÷ $□$ = 5 ······ 2 62 ÷ $□$ = 7 ······ 6
29 ÷ $□$ = 4 ······ 1 66 ÷ $□$ = 7 ······ 3 47 ÷ $□$ = 5 ······ 2
13 ÷ $□$ = 4 ······ 1 38 ÷ $□$ = 6 ······ 2 45 ÷ $□$ = 6 ······ 3
74 ÷ $□$ = 8 ······ 2 50 ÷ $□$ = 7 ······ 1 55 ÷ $□$ = 7 ······ 6
答案
8;7;8;
6;4;8;
9;7;8;
7;9;9;
3;6;7;
9;7;7
6;4;8;
9;7;8;
7;9;9;
3;6;7;
9;7;7
五、(
16 >(
30 >(
35 >(
53 >(
63 >(
45 >(
第三周
)里最大能填多少?16 >(
第三周
)× 2 (第三周
)× 5 < 24 (第三周
)× 6 < 2030 >(
第三周
)+ 18 (第三周
)- 18 < 23 (第三周
)× 7 < 4935 >(
第三周
)× 6 (第三周
)× 9 < 36 (第三周
)× 6 < 3053 >(
第三周
)- 19 (第三周
)+ 28 < 66 (第三周
)× 4 < 1863 >(
第三周
)× 8 (第三周
)- 13 < 77 (第三周
)× 5 < 2545 >(
第三周
)× 5 (第三周
)× 9 < 63 (第三周
)× 6 < 18答案
7,4,3,
11,40,6,
5,3,4,
71,37,4,
7,89,4,
8,6,2
11,40,6,
5,3,4,
71,37,4,
7,89,4,
8,6,2
六、想一想,填一填。

答案
$3$;$8$;$5$;$9$。
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